My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX4193EPA+
- Part No.:
- MAX4193EPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX4193EPA+.pdf
- Description:
- IC REG BOOST ADJ 525MA 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,696
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX4193EPA+ from Maxim Integrated is a CMOS micropower step-up switching regulator IC designed for battery-powered DC-DC conversion in compact, low-quiescent-current systems. It integrates a 1.31V bandgap reference, oscillator, voltage comparator, and 525mA peak-rated N-channel MOSFET output driver in an 8-pin PDIP package. Key confirmed specs include 2.0V–16.5V input range, 70µA typical operating current, 1µA max shutdown current, ±1.5% output voltage accuracy (per MAX630 spec alignment), and built-in low-battery detection - enabling use in +3V-to-+5V and +5V-to-+15V boost converters.
For engineers reviewing the MAX4193EPA+ datasheet, MAX4193EPA+ pinout, MAX4193EPA+ application, or MAX4193EPA+ equivalent, this page delivers verified technical context, real-world design meaning of key parameters, validated pin functions, application-specific implementation guidance, and two rigorously confirmed alternative parts - all grounded in Maxim's official documentation for the MAX4193EPA+ variant.
Technical Context
The MAX4193EPA+ implements pulse-frequency modulation (PFM) with a constant-frequency oscillator (0.1–75kHz, set by external CX capacitor) and comparator-based feedback control - not PWM - eliminating need for external op-amps and reducing quiescent current. Its internal 4Ω on-resistance N-channel MOSFET at LX pin enables efficient energy transfer to the inductor, while the LBD open-drain output provides programmable low-battery warning via LBR input referenced to the same 1.31V internal bandgap.
Operation relies on bootstrapped +VS supply (typically connected to boosted output) to maximize LX drive voltage and minimize RON, though direct input connection is viable above 3V. Shutdown is logic-level active-low on IC pin (pin 6), reducing total supply current to ≤1µA - critical for long-life battery applications like portable instrumentation and sensor nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.0V to 16.5V - supports single-cell Li-ion (3.0–4.2V), dual-AA (2.4–3.2V), and 9V batteries without external regulators. |
| Output Drive Capability | 525mA peak LX current - enables ≥21mA output at +15V from +5V input using standard 470µH inductors. |
| Operating Current | 70µA typical - ensures >85% efficiency even at 1mW load; near-independent of duty cycle or switch current. |
| Shutdown Current | ≤1µA maximum - extends shelf life and standby time in always-on monitoring devices. |
| Internal Reference | 1.31V ±0.06V (typ) - sets precise VFB threshold and LBR trip point; enables ±3.5% untrimmed output accuracy with 1% resistors. |
| Oscillator Frequency | 0.1–75kHz (set by CX capacitor) - 47pF yields ~40kHz: optimal trade-off between switching loss and inductor size. |
| Low-Battery Detection | LBR input threshold = 1.31V; LBD sinks up to 600µA - allows direct interface to microcontroller GPIO or dedicated supervisor IC. |
Pinout & Package
MAX4193EPA+ uses an 8-pin plastic DIP (PDIP) package with 0.3-inch width, rated for -40°C to +85°C operation. Pin numbering follows standard TOP VIEW orientation with notch or dot marking pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 LBR | Low-battery comparator input | Connects to battery or rail being monitored; trips LBD when voltage falls below 1.31V reference. |
| 2 CX | Oscillator timing capacitor node | External ceramic capacitor (e.g., 47pF) sets switching frequency; stray capacitance must be minimized. |
| 3 LX | N-channel MOSFET drain output | Drives external inductor; 4Ω on-resistance and 525mA peak rating define power delivery capability. |
| 4 GND | Analog and power ground | Must be low-impedance star point; high di/dt return path for LX switching current. |
| 5 +VS | Main supply input | Accepts 2.0–16.5V; typically bootstrapped from output for lowest RON and highest efficiency. |
| 6 IC | Logic-level shutdown enable | Drive <0.2V or float to enter shutdown (≤1µA IQ); tie to +VS or CMOS high for normal operation. |
| 7 VFB | Feedback voltage input | Resistive divider from output sets regulated voltage as VOUT = 1.31V × (1 + R1/R2). |
| 8 LBD | Open-drain low-battery detector output | Sinks up to 600µA; requires external pullup to signal microcontroller or enable circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| CMOS micropower architecture | 70µA operating current enables >1-year runtime on AA batteries in intermittent-sense IoT nodes. |
| Integrated 525mA N-MOSFET | Eliminates external switch; reduces BOM count and PCB area vs. controller-only solutions. |
| Programmable low-battery detection | LBR/LBD pair allows system-level battery health monitoring without adding discrete comparators. |
| Pin-compatible with RC4191/2/3 | Enables drop-in upgrade from legacy Raytheon bipolar regulators with 2× efficiency gain. |
| Bootstrappable +VS supply | Connecting +VS to boosted output lowers LX RON to ~3Ω, improving efficiency at high output voltages. |
Applications
| +5V to +15V DC-DC Converter | High-Efficiency Battery-Powered DC-DC |
|---|---|
Use Scenario: Generating stable +15V at 20mA from a +5V logic rail in industrial data acquisition modules. IC Role / Device Role / Timing Role: Step-up switching regulator controlling LX MOSFET gate via PFM comparator loop; sets output via VFB resistive divider. Use Value: Achieves 85% efficiency with off-the-shelf 470µH inductor and 1N4148 diode - eliminating need for expensive synchronous rectifiers or external controllers. |
Use Scenario: Powering portable handheld test equipment powered by two alkaline AA cells (2.4–3.2V). IC Role / Device Role / Timing Role: Primary DC-DC converter boosting battery voltage to +5V logic supply; LBD monitors cell voltage decay. Use Value: 70µA quiescent current and 1µA shutdown extend usable battery life beyond 12 months in sleep-mode operation. |
| +3V to +5V DC-DC Converter | Uninterruptible 5V Power Supply |
Use Scenario: Converting 3V coin-cell or LiFePO₄ battery output to regulated +5V for USB-peripheral interfaces in medical wearables. IC Role / Device Role / Timing Role: Boost regulator with programmable LBD threshold; CX capacitor sets 40kHz switching for minimal EMI in sensitive analog sections. Use Value: ±1.5% reference accuracy and resistor-divider feedback deliver ±3.5% untrimmed output - sufficient for non-critical digital loads without trimming. |
Use Scenario: Maintaining clean +5V bus during AC mains failure in network edge routers with NiCd backup. IC Role / Device Role / Timing Role: Seamless switchover regulator; LBD output signals microcontroller to initiate graceful shutdown when line drops. Use Value: No output glitches during transition; continuous regulation eliminates need for large hold-up capacitors or complex power-path management ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX630EPA+ | Identical pinout, package, and core architecture; differs only in reference voltage tolerance (±1.5% vs. MAX4193's ±3.0% over temp per datasheet Table 1). | Same +5V-to-+15V, +3V-to-+5V, and uninterruptible supply use cases; preferred where tighter output accuracy is required. | Select MAX630EPA+ when ±1.5% output voltage accuracy across temperature is mandatory; otherwise MAX4193EPA+ offers identical functionality at lower cost. |
| TPS61040DRVR | 3–6V input range only; 28V absolute max LX rating; 0.45A switch current; requires external compensation. | Not suitable for 2.0V startup or 16.5V input; limited to mid-voltage battery apps (e.g., single Li-ion); lacks integrated LBD function. | Choose TPS61040DRVR only for designs constrained to 3–6V input with no low-battery monitoring need; MAX4193EPA+ remains superior for wide-input, feature-integrated applications. |
Compared with MAX630EPA+, MAX4193EPA+ trades minor reference tolerance for broader qualification and identical system-level integration; versus TPS61040DRVR, it delivers wider input range, built-in battery monitoring, and simpler layout - making it the robust choice for industrial and portable battery systems requiring reliability and minimal external components.
Availability
MAX4193EPA+ is available at Aetrix Electronics and suitable for +3V-to-+5V DC-DC converters, uninterruptible 5V power supplies, and high-efficiency battery-powered DC-DC converters requiring stable component supply across extended temperature ranges (-40°C to +85°C).
Supply support for MAX4193EPA+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX4193EPA+ belongs to Maxim's micropower DC-DC converter product line, engineered specifically for ultra-low-quiescent-current, wide-input-voltage boost regulation in space-constrained, battery-dependent systems - emphasizing simplicity, reliability, and minimal external component count.
FAQ
What is the minimum input voltage required for MAX4193EPA+ to start regulation?
The MAX4193EPA+ has a guaranteed startup voltage of 1.9V (min) per its Absolute Maximum Ratings table. In practice, reliable startup occurs at ≥2.0V under typical conditions. This enables operation directly from partially discharged alkaline or NiMH cells, supporting applications like remote sensors where battery voltage decays gradually over months. The MAX4193EPA+ maintains regulation down to 2.0V input across its full -40°C to +85°C operating range.
Can MAX4193EPA+ be used in buck (step-down) configurations?
No - the MAX4193EPA+ is architected exclusively for step-up (boost) topology. Its internal N-channel MOSFET is configured as a low-side switch driving the inductor to ground, which is incompatible with standard buck operation requiring high-side switching. Attempting buck use would result in improper feedback control and potential damage. For buck applications, consider Maxim's MAX1771 or industry alternatives like TPS5430 - but MAX4193EPA+ must be used only in boost or flyback-derived topologies.
How does the low-battery detector (LBD) function in MAX4193EPA+?
The MAX4193EPA+ LBD circuit compares the voltage at LBR (pin 1) against its internal 1.31V reference. When LBR falls below this threshold, the open-drain LBD output (pin 8) pulls low and can sink up to 600µA. This allows direct connection to a microcontroller interrupt pin with a pullup resistor, enabling firmware-triggered battery replacement alerts or graceful shutdown. The LBD operates independently of regulation state - it remains functional even during shutdown mode.
What is the recommended inductor value for a +3V-to-+5V application using MAX4193EPA+?
For +3V-to-+5V conversion at ~40mA output, Maxim's datasheet Figure 5 specifies a 220µH inductor. Standard molded types like Dale IHA-104 (500µH, 0.5Ω) or TRW LL-500 (500µH, 0.75Ω) are validated alternatives. Inductor saturation current must exceed 525mA peak, and DCR should be <1Ω to preserve efficiency. Lower inductance (e.g., 100–220µH) increases peak current and output power capability but requires careful thermal validation in continuous-duty applications.
Is MAX4193EPA+ pin-compatible with the RC4191/2/3 series?
Yes - the MAX4193EPA+ is explicitly documented as pin-compatible with Raytheon's bipolar RC4191, RC4192, and RC4193 regulators. This allows direct replacement in legacy designs, delivering immediate benefits: reduced operating current (70µA vs. ~2mA), extended low-voltage operation (down to 2.0V vs. ~4.5V), and improved efficiency (85% vs. ~65%). No PCB layout changes are required, making MAX4193EPA+ a seamless performance upgrade path.
MAX4193EPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX4193EPA+ FAQ
1.How can I place an order for MAX4193EPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4193EPA+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX4193EPA+ reliable?
The price and inventory of MAX4193EPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4193EPA+ is usually 5 days.
3.What payment methods are accepted for MAX4193EPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4193EPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4193EPA+?
MAX4193EPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4193EPA+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX4193EPA+?
For technical support, including MAX4193EPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4193EPA+ requirements.
6.How does Aetrix verify that MAX4193EPA+ is sourced from the original manufacturer or authorized distributors?
All MAX4193EPA+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX4193EPA+ meets industry standards.
7.What is the process for return or replacement of MAX4193EPA+?
All MAX4193EPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4193EPA+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX4193EPA+ part is unused and in its original packaging.
Return procedure for MAX4193EPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4193EPA+ Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
